Air heater



Wuly lll l1924. 1,499,442

L H. E. BROWNING AIR HEATER Filed Feb. 18 1924 2 Sheets-Sheet l HozncidFully 1l H. E. BROWNING AIE HEATER Filed Feb. 18 1924 2 sheets-sheet 2Patented duly l, i924.

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HOWARD E. BBOWNING, 0F CHESTER, ILLINOIS.

AIR HEATER.

Application filed February 18, 1924.-,

To allwhom, t may concern:

Be it known that HOWARD E. BnowNrNs, a. citizen of the United States,residing at Chester, in the county of Randolph and State of Illinois,has invented certain new and useful Improvements in A ir Heaters, ofwhich the following is a specification.

This invention relates to air heaters adapted to be used in conjunctionwith furnace structures, and it consists in the novel featureshereinafter described and claimed. An object Vof the invention is toprovide an air heater of simple structure having maximum area of airheating surface where by economy may be effected in the use of fuel inthat an increased area of heat absorbing surface is presented to thefire and products of combustion thereof.

In structure, the air heater includes a unit having a pocket, or aseries of pockets, the opening or openings of which are disposed abovethe fire pot of the furnace. These pockets receive the products ofcombustion fromy the fire pot and the pockets are provided at theirupper portions with an opening ornopenings, which are adapted tocommunicate with a smoke pipe, whereby the products of combustion afterbeing deprived of heat units, are discharged from the pockets into thesmoke pipe.

'Ihe pockets are spaced from each otherV and disposed in para elrelation and a hood is disposed over the pockets and is provided withskirt portions extended down along the sides of the fire pot to the baseof the furnace. The skirt portions are provided in the vicinity of theirlower edges with: openings which admit cool air from the vicinity of thefloor level. This air passes up along the sides of the lire pot and ispreheated7 it then passes through the spaces between the pockets and issuperheated and in such condition may rise from the top of the furnaceand circulate about the building or structure in which the heater islocated.

The features for permitting the products of combustion to escape fromthe pockets may be of various forms and arrangements. In onearrangement, the products of' combustion may escape from the end wallsof the pockets, in another arrangement the products of combustion mayescape from the end walls and top walls of the pockets, and in a thirdarrangement, the products Serial No. 693,680.

of combustion may escape from the top walls only of the pockets.

In the accompanying drawings z- Figure l is a vertical sectional viewshowing one form of the air heater applied to the fire pot of a furnace.

Figure 2 is a transverse sectional view of the form of the invention asillustrated in Figure l, and cut on the line 22 thereof.

Figure 3 is a top plan view of the form of air heater as shown in Figurel.

VFigure 4 is a detail sectional view showing a modified form andarrangement of the pockets of the air heater.

Figure 5 is a top plan view of the arrangement and form of pockets asshown in Figure 4.

Figure 6 is a perspective view of a further modified form of pocketswhich may be employed in the heater.

In the form of the invention as 'illustrated in Figures 1,'2 and 3 ofthe drawing, the same includes pocket members l which are preferablyintegrally joined together and spaced from each other and disposed inparallel relation. The mouths 2 of the pocket members are downwardlydisposed and located above the fire pot 3 of a furnace structure. Thepocket members l are provided at their vertical side edges and in thevicinity of their upper edges with outlet openings l which register witha smoke pipe carried at the upper portion of a hood (i which is disposedover the pocket members l. The hood 6 is provided at its opposite sidesand in the vicinity of the upper edge of the fire pot with openings 7and skirt V portions 8 are disposed over the said openings 7 and extenddownwardly from the sides of the hood along the body of the furnace andspaced therefrom and terminate at their lower edges at the base of thefurnace. The said skirt portions 8 are provided just above the floorlevel with air inlet openings 9.

The operation of the heater is as follows. The products of combustionfrom the fire in the vfire pot 3, pass up into the pocket members l andheat the side walls thereof. The products of combustion pass fromr thepockets l through the openings 4L into the smoke pipe 5 and are carriedup the flue in the usual manner. At the same time, cold air enters underthe skirt portions 8 through the openings 9, passes up along the sidesof llO the body vof the furnace and is preheated. This air vpassesbetween the pocket members l and is superheated by coming in contactwith the heated surfaces thereof and emerges from the furnace at the topof the hood 6.

ln the form and arrangement of the air heatingv apparatus shown inFigures 4: and 5 ofthe drawings, the saine consists of single Yorindividual poclietrmembers l having base flanges l0 adapted to entergrooves provided inthe side edges of heat resisting bars il whichv aredisposed transversely of the fire pot 3. Y Y

n this 'forni of the invention, the pocket members l in additiontohaving the outlet openings 43,' provided at therupper portions ofVtheir end edges, are also provided at theirl top sides and atpoints-midway vbetween their ends with outlet openings l2 andConsequently the products ofv combustion maybe taken from the pocketmembers at the ends thereof and at the top side thereof at points midwaybetween the ends.

In the form of the invention as illustrated in Figure 6 ofthe drawings7the pocket niem- Vber l", is devoid of the exit -openingsat the upperportions of its end edges and is provided at'i't-s top side with anoutlet opening` l2', the said opening being located at a point midwaybetween the ends of the said pocket member. In this form'of pocket'member, the products of combustion are permitted Vtovescape from thesame at the top thereof andata point midway between the ends thereofonly. Y Vl Y Y inthe forms ofthe invention as illustrated in Figures t,5 and (i, the air is heated in the same manner as that described 4inconjunction with the form of the invention asillustrated in Figures l, 2and 3 andthe pr'oducts'of combustion contribute their heat units to thesurfaces ofthe pocket `members in the same manner as that described inconnection 'with the description given of the form'of the inventionshown in Figures l, 2 and 3.

In the form of the invention as illustrated in Figures l, 2 and 3, thepocket members are preferably formed from sheet metal. In"

the forms of the invention as shown in Figures l, 5 and 6, the pocketmembers are preferably composed of cast m-etal.

Having described the invention, what is claimed is:

l. An air heater for use in conjunction with a furnace comprising pocketmembers having mouths adapted to be disposed above the fire pot of thefurnace7 the pocket members being spaced from each other and disposed inparallel relation, the pocket niembers being provided at their upperportions with outlet openings through which the products of combustionmay make exit, a hood disposed over the pocket members and provided atits sides with openings, skirt poi'- tions depending from the hood anddisposed over the openings therein and adapted to extend along the sidesof the furnace, the said skirt portions being provided in the vicinityof their lower edges with air inlet openings.

iin air rheated adapted for use in conjunction with a furnace comprisingpockets provided with mouths yadapted to be disposed above the fire potof the furnace, said pockets being provided at their upper portions withopenings through which the products of combustion may make exit, saidpockets being provided at their lower edges with flanges and groovedbars interposed between the flanges of the adjacent pockets,A thegrooves in the bars receiving the edge portions of the flanges,

In testimony whereof I aiiiX my signature.

HOWARD E. BROWNING.

